Parse an optional column list after a CTE

tests/sqlparser_common.rs

@@ -1027,9 +1027,14 @@ fn parse_ctes() {
     fn assert_ctes_in_select(expected: &[&str], sel: &SQLQuery) {
         let mut i = 0;
         for exp in expected {
-            let Cte { query, alias } = &sel.ctes[i];
+            let Cte {
+                query,
+                alias,
+                renamed_columns,
+            } = &sel.ctes[i];
             assert_eq!(*exp, query.to_string());
             assert_eq!(if i == 0 { "a" } else { "b" }, alias);
+            assert!(renamed_columns.is_empty());
             i += 1;
         }
     }
@@ -1066,6 +1071,16 @@ fn parse_ctes() {
     assert_ctes_in_select(&cte_sqls, &only(&select.ctes).query);
 }
 
+#[test]
+fn parse_cte_renamed_columns() {
+    let sql = "WITH cte (col1, col2) AS (SELECT foo, bar FROM baz) SELECT * FROM cte";
+    let query = all_dialects().verified_query(sql);
+    assert_eq!(
+        vec!["col1", "col2"],
+        query.ctes.first().unwrap().renamed_columns
+    );
+}
+
 #[test]
 fn parse_derived_tables() {
     let sql = "SELECT a.x, b.y FROM (SELECT x FROM foo) AS a CROSS JOIN (SELECT y FROM bar) AS b";